5.
Server-Side Mitigations X-Frame-Options  Response Header  Supported by most of the latest browsers  Two possible values to use:  DENY  The page cannot be displayed in a frame, regardless of the site attempting to do so  SAMEORIGIN  The page can only be displayed in a frame on the same origin as the page itself.

10.
CSS Basics Opacity  Set Transparency for the element Top, Left  Negative values shift elements out of the browser window Position  Specifies the type of positioning method used for an element  Static (default) - The box is a normal box. The top, right, bottom, and left properties do not apply.  Relative - The boxs position is calculated according to the normal flow  Absolute - The boxs position is specified with the top, right, bottom, and left properties  Fixed - The boxs position is calculated according to the absolute model, but in addition, the box is fixed.